Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 42, NWS Buffalo, NY

June 15, 2017Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 15, 2017, 5:26 PM EDT for Livingston County, Ontario County, New York. It was in force for 64 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 15, 2017, 5:26 PM EDT (21:26 UTC)
Expired: Jun 15, 2017, 6:30 PM EDT
In force: 64 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 97 km from the middle of the area, began a volume at 21:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 15, 5:31 PM EDT	TSTM WND DMG	2 Se Groveland, NY	TREES DOWN
Jun 15, 5:32 PM EDT	TSTM WND DMG	Groveland, NY	TREES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.4 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1392 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

775 
WUUS51 KBUF 152126
SVRBUF
NYC051-069-152230-
/O.NEW.KBUF.SV.W.0042.170615T2126Z-170615T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
526 PM EDT THU JUN 15 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Livingston County in western New York...
  Southwestern Ontario County in western New York...

* Until 630 PM EDT.

* At 525 PM EDT, a severe thunderstorm was located near Dansville,
  moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Dansville, Naples, Groveland, Springwater, Ossian, Sonyea, Ossian
  Center and Hunt Hollow.

This includes Interstate 390 between exits 4 and 6.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4252 7790 4270 7787 4272 7735 4267 7737
      4258 7737 4258 7766 4254 7766 4253 7772
      4250 7772
TIME...MOT...LOC 2125Z 275DEG 20KT 4261 7779 

HAIL...1.00IN
WIND...60MPH
 
$$

Church

3 follow-up statements

518 
WWUS51 KBUF 152133
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
533 PM EDT THU JUN 15 2017

NYC051-069-152230-
/O.CON.KBUF.SV.W.0042.000000T0000Z-170615T2230Z/
Livingston NY-Ontario NY-
533 PM EDT THU JUN 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN LIVINGSTON AND SOUTHWESTERN ONTARIO COUNTIES...

At 533 PM EDT, a severe thunderstorm was located near Dansville,
moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Dansville, Naples, Groveland, Springwater, Ossian, Sonyea, Ossian
Center and Hunt Hollow.

This includes Interstate 390 between exits 4 and 6.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4252 7790 4270 7787 4272 7735 4267 7737
      4258 7737 4258 7766 4254 7766 4253 7772
      4250 7772
TIME...MOT...LOC 2133Z 275DEG 20KT 4261 7773 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Church

538 
WWUS51 KBUF 152149
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
549 PM EDT THU JUN 15 2017

NYC051-069-152230-
/O.CON.KBUF.SV.W.0042.000000T0000Z-170615T2230Z/
Livingston NY-Ontario NY-
549 PM EDT THU JUN 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN LIVINGSTON AND SOUTHWESTERN ONTARIO COUNTIES...

At 548 PM EDT, a severe thunderstorm was located over Wayland, or
near Dansville, moving east at 25 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect wind damage to trees and power lines. 

Locations impacted include...
Dansville, Naples, Groveland, Springwater, Ossian, Sonyea, Ossian
Center and Hunt Hollow.

This includes Interstate 390 between exits 4 and 6.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4252 7790 4270 7787 4272 7735 4267 7737
      4258 7737 4258 7766 4254 7766 4253 7772
      4250 7772
TIME...MOT...LOC 2148Z 275DEG 20KT 4260 7762 

HAIL...<.75IN
WIND...60MPH
 
$$

Church

380 
WWUS51 KBUF 152224
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
624 PM EDT THU JUN 15 2017

NYC051-069-152234-
/O.EXP.KBUF.SV.W.0042.000000T0000Z-170615T2230Z/
Livingston NY-Ontario NY-
624 PM EDT THU JUN 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LIVINGSTON AND
SOUTHWESTERN ONTARIO COUNTIES WILL EXPIRE AT 630 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However heavy rain 
and flash flooding is still possible with this thunderstorm.

LAT...LON 4252 7790 4270 7787 4272 7735 4267 7737
      4258 7737 4258 7766 4254 7766 4253 7772
      4250 7772
TIME...MOT...LOC 2224Z 275DEG 20KT 4258 7735 

$$

Church

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 9:16 AM EDT	Special Weather Statement	BUF	Genesee	59 min
Jun 15, 10:17 AM EDT	Special Weather Statement	BUF	Livingston, Monroe	58 min
Jun 15, 11:24 AM EDT	Special Weather Statement	BUF	Ontario, Wayne	66 min
Jun 15, 11:41 AM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 4 more	11 hr
Jun 15, 3:46 PM EDT	Special Weather Statement	BUF	Allegany, Cattaraugus, Livingston, Ontario, Wyoming	3 hr
Jun 15, 4:16 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	44 min
Jun 15, 4:54 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	66 min
Jun 15, 4:54 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe	51 min
Jun 15, 5:19 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Livingston, Ontario, Wyoming	7 hr
Jun 15, 5:26 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans	49 min
Jun 15, 5:46 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	29 min
Jun 15, 5:53 PM EDT	Special Marine Warning	BUF		52 min
Jun 15, 6:31 PM EDT	Special Weather Statement	BUF	Allegany	29 min
Jun 15, 6:42 PM EDT	Special Weather Statement	BUF	Monroe	63 min
Jun 15, 7:05 PM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario	3 hr

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.